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class="gs_asd_dt"><label for="gs_asd_eq"><b>without</b> the words</label></div><div class="gs_asd_dd"><div class="gs_in_txtw gs_in_txtm gs_in_txtb"><input type="text" class="gs_in_txt" name="as_eq" value="" id="gs_asd_eq" autocapitalize="off"><div class="gs_in_txts"></div></div></div></div><div class="gs_asd_tr"><div class="gs_asd_dt"><label for="gs_asd_occt">where my words occur</label></div><div class="gs_asd_dd"><div class="gs_asd_occtr"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="as_occt" value="any" id="gs_asd_occt_a" checked><label for="gs_asd_occt_a">anywhere in the article</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div><div class="gs_asd_occtr"><span class="gs_in_ra" onclick="void(0)"><input type="radio" name="as_occt" value="title" id="gs_asd_occt_t"><label for="gs_asd_occt_t">in the title of the article</label><span class="gs_chk"></span><span class="gs_cbx"></span></span></div></div></div><div class="gs_asd_tr"><div 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data-cid="H4arVMOtrDIJ" data-did="H4arVMOtrDIJ" data-lid="" data-aid="H4arVMOtrDIJ" data-rp="0"><div class="gs_ggs gs_fl"><div class="gs_ggsd"><div class="gs_or_ggsm" ontouchstart="gs_evt_dsp(event)" tabindex="-1"><a href="https://adsabs.harvard.edu/pdf/1973Ap%26SS..21..117A" data-clk="hl=en&sa=T&oi=gga&ct=gga&cd=0&d=3651484452341384735&ei=IZpLZ6TcJcCI6rQP7a6JuQc" data-clk-atid="H4arVMOtrDIJ"><span class=gs_ctg2>[PDF]</span> harvard.edu</a></div></div></div><div class="gs_ri"><h3 class="gs_rt" ontouchstart="gs_evt_dsp(event)"><a id="H4arVMOtrDIJ" href="https://link.springer.com/article/10.1007/BF00642197" data-clk="hl=en&sa=T&ct=res&cd=0&d=3651484452341384735&ei=IZpLZ6TcJcCI6rQP7a6JuQc" data-clk-atid="H4arVMOtrDIJ">Structure and evolutionary history of the solar system, III</a></h3><div class="gs_a gs_fma_s">H Alfvén, G Arrhenius - Astrophysics and Space Science, 1973 - Springer</div><div class="gs_a gs_fma_p"><div class="gs_fmaa">H Alfvén, G Arrhenius</div>Astrophysics and Space Science, 1973<span class="gs_pdot">•</span>Springer</div><div class="gs_rs gs_fma_s">Parts I and II of our analysis of the evolution of the solar system were devoted mainly to the <br>mechanical processes. The present part (Part III) deals primarily with the plasma processes <br>and the hydromagnetic aspects. Much confusion in the cosmogonic field is due to the <br>treatment of the early phases of the evolution of a circumstellar medium by pre-<br>hydromagnetic methods, or by erroneous application of magnetohydrodynamics. In order to <br>reduce the speculative element as far as possible the present analysis tries to connect the …</div><div class="gs_fma gs_fma_p gs_invis"><div class="gs_fma_brdr"></div><div class="gs_fma_wpr"><div class="gs_fma_con gs_fma_sh" data-trk="/scholar_url?url=https://link.springer.com/article/10.1007/BF00642197&hl=en&sa=T&oi=fma-abs-view&ct=fma-expand&d=3651484452341384735&ei=IZpLZ6TcJcCI6rQP7a6JuQc&tab=-1&at=Structure+and+evolutionary+history+of+the+solar+system,+III https://www.google-analytics.com/collect?v=1&tid=UA-117450069-1&aip=1&cid=10000631902811194848&dr=https%3A%2F%2Fscholar.google.com&t=pageview&dl=https://link.springer.com/article/10.1007/BF00642197&dt=Structure+and+evolutionary+history+of+the+solar+system,+III"><div class="gs_fma_hdr">Abstract</div><div class="gs_fma_abs"><div class="gs_fma_grad"></div><div class="gs_fma_snp"> <div class="gsh_csp">Parts I and II of our analysis of the evolution of the solar system were devoted mainly to the mechanical processes. The present part (Part III) deals primarily with the plasma processes and the hydromagnetic aspects.</div> <div class="gsh_csp">Much confusion in the cosmogonic field is due to the treatment of the early phases of the evolution of a circumstellar medium by pre-hydromagnetic methods, or by erroneous application of magnetohydrodynamics. In order to reduce the speculative element as far as possible the present analysis tries to connect the cosmogonic processes as directly as possible to laboratory plasma physics and to space phenomena actually observed today (Section 10).</div> <div class="gsh_csp">Models of the Laplacian type have been made obsolete by magnetohydrodynamics. Furthermore they are in conflict with observations. A new model is suggested (Section 11).</div> <div class="gsh_csp">A plasma surrounding a rotating central body may attain a state of partial corotation which is determined by the balance between gravitation and the centrifugal force acting on a plasma in a dipole field. Condensation from a partially corotating plasma results in grains orbiting in ellipses with<i>e</i>=1/3 and finally accreting to bodies at 2/3 of the central distance of the point of condensation (Section 12).</div> <div class="gsh_csp">An application of the theory to the Saturnian rings and to the asteroidal belt shows that the falldown ratio 2/3 (derived from the geometry of a dipole field) is essential for the understanding of their structure. The structure of the groups of planets and satellites is also discussed but only in a preliminary way. The behavior of volatile substances is a major problem which still awaits an appropriate treatment (Section 13).</div></div><div class="gs_fma_fons"><div class="gs_fma_fon">Springer</div></div></div><div class="gs_fma_sml"><a class="gs_fma_sml_a" data-idx="0" href="javascript:void(0)" role="presentation"><span class="gs_fma_smlsm">Show more</span><span class="gs_fma_smlsl">Show less</span><span class="gs_fma_smlar"></span></a></div></div></div></div><div class="gs_fl gs_flb gs_invis"><a href="javascript:void(0)" class="gs_or_sav gs_or_btn" role="button"><svg viewBox="0 0 15 16" class="gs_or_svg"><path d="M7.5 11.57l3.824 2.308-1.015-4.35 3.379-2.926-4.45-.378L7.5 2.122 5.761 6.224l-4.449.378 3.379 2.926-1.015 4.35z"/></svg><span class="gs_or_btn_lbl">Save</span></a> <a href="javascript:void(0)" class="gs_or_cit gs_or_btn gs_nph" role="button" aria-controls="gs_cit" aria-haspopup="true"><svg viewBox="0 0 15 16" class="gs_or_svg"><path d="M6.5 3.5H1.5V8.5H3.75L1.75 12.5H4.75L6.5 9V3.5zM13.5 3.5H8.5V8.5H10.75L8.75 12.5H11.75L13.5 9V3.5z"/></svg><span>Cite</span></a> <a href="/scholar?cites=3651484452341384735&as_sdt=2005&sciodt=0,5&hl=en">Cited by 44</a> <a href="/scholar?q=related:H4arVMOtrDIJ:scholar.google.com/&scioq=&hl=en&as_sdt=0,5">Related articles</a> <a href="/scholar?cluster=3651484452341384735&hl=en&as_sdt=0,5" class="gs_nph">All 8 versions</a> <a href="javascript:void(0)" title="More" class="gs_or_mor gs_oph" role="button"><svg viewBox="0 0 15 16" class="gs_or_svg"><path d="M0.75 5.5l2-2L7.25 8l-4.5 4.5-2-2L3.25 8zM7.75 5.5l2-2L14.25 8l-4.5 4.5-2-2L10.25 8z"/></svg></a> <a href="javascript:void(0)" title="Fewer" class="gs_or_nvi gs_or_mor" role="button"><svg viewBox="0 0 15 16" class="gs_or_svg"><path d="M7.25 5.5l-2-2L0.75 8l4.5 4.5 2-2L4.75 8zM14.25 5.5l-2-2L7.75 8l4.5 4.5 2-2L11.75 8z"/></svg></a></div></div></div></div><div id="gs_res_ccl_bot" class="gs_fmarb gs_invis"><div style="height:1em"></div></div></div></div></div><div id="gs_ftr_sp" role="presentation"></div><div id="gs_ftr" class="gs_md_rmb" role="contentinfo"><div id="gs_ftr_rt"><a href="//www.google.com/intl/en/policies/privacy/">Privacy</a><a href="//www.google.com/intl/en/policies/terms/">Terms</a><a href="javascript:void(0)" ontouchstart="gs_evt_dsp(event)" role="button" aria-controls="gs_ftr_mnu" aria-haspopup="true" class="gs_press gs_md_tb">Help</a></div><div id="gs_ftr_mnu" class="gs_md_d gs_md_ds gs_ttzi gs_md_ulr" role="menu" tabindex="-1"><a role="menuitem" href="/intl/en/scholar/about.html" tabindex="-1" class="gs_md_li">About Scholar</a><a role="menuitem" href="//support.google.com/websearch?p=scholar_dsa&hl=en" tabindex="-1" class="gs_md_li">Search help</a></div></div></div></body></html>